The apostrophe should come before the “s” if the period of time being discussed is singular: a day’s work a week’s holiday a month’s food The apostrophe should get added after the letter “s” if the duration of time being discussed is plural: two months’ notice period five years’ contract seven weeks’ diet plan

A. Yes. Please see CMOS 6.118: “An apostrophe should not be confused with a single closing quotation mark; when a word ends in an apostrophe, no period or comma should intervene between the word and the apostrophe.”